Local zoning · Sacramento County
Sacramento County — Overlay Districts
Overlay Districts under the Sacramento County local zoning and planning code, with the controlling citations.
Last reviewed: July 6, 2026
Overview
In unincorporated areas of Sacramento County, overlay districts in the Sacramento Zoning Code (SZC) add location-specific rules on top of a parcel’s base zoning. Some are “combining” overlays that supplement the base zone; others are “special” districts that can change uses and standards more broadly. In all cases, the stricter rule controls. See how overlays relate to your base zone under Sacramento County’s zoning framework and countywide development standards.
Plain-English rule of thumb: If your parcel has an overlay, plan as if you must meet both the base zone and the overlay—whichever is stricter—because combining overlays add or modify standards, while special districts can reset them (§ 4.1.3).
Below is a district-by-district guide to every overlay in SZC Chapter 4 for unincorporated areas, with purposes, typical approvals, and the most decision-relevant dimensional standards.
Flood (F) Combining Zoning District
- Purpose and where it applies
- Applied to land covered by rivers/creeks/streams and land subject to flooding in unincorporated areas (§ 4.2.1.A).
- The County may recommend (F) where Water Resources provides evidence the site is in a FEMA or other recognized floodplain (§ 2.1.4.B).
- Typical permitted uses/approvals
- Your underlying uses remain, but you must meet floodplain and designated tributary standards in § 4.2.4–4.2.5 in addition to other applicable water agency rules (§ 4.2.4.B).
- Key dimensional/locational standards
- If no public water/sewer is in use, the minimum net lot area is one acre (§ 4.2.4.A).
- For designated tributaries, place construction either outside the 100‑year floodplain, or at least 25 feet from the tributary centerline and outside the floodway; finished floor must be 1.5 feet above 100‑year flood level, or at/above the 200‑year floodplain in Urban Level of Flood Protection areas (§ 4.2.5.A.1–2).
- Fill in tributary floodplains is tightly limited with hydrologic and tree-protection conditions (§ 4.2.5.A.6).
Food Processing (FP) Combining Zoning District
- Purpose and where it applies
- Sited in agricultural areas to accommodate food processing that needs land-extensive wastewater disposal while protecting agriculture; may be combined with AG-160, AG-80, AG-40, AG-20, UR (§ 4.3.1, § 4.3.1.A).
- Typical permitted uses/approvals
- Underlying permitted/conditional uses still apply (§ 4.3.2.A).
- Food processing industries and land application of process wastewater require a Conditional Use Permit (CUP) by the Board of Supervisors (§ 4.3.2.B–C).
- Key dimensional/locational standards
- Setbacks scaled to building height; strong screening/landscaping and equipment concealment; signs per county signage standards unless further conditioned (§ 4.3.3.A–C).
- CUP review focuses on parking and truck circulation (coordinate with parking), soils, water supply/consumption, grading/irrigation, and more (§ 4.3.4.A).
- Board may require a bond; findings must show mitigation of environmental effects and agricultural benefit (§ 4.3.4.C–E).
Mobile Home Park (MHP) Combining Zoning District
- Purpose and where it applies
- Enables mobile home parks consistent with surrounding densities; can be combined with any residential base zone (§ 4.4.1, § 4.4.1.A).
- Typical permitted uses/approvals
- Uses per Table 3.1 for residential categories, subject to § 4.4; site development plan required (§ 4.4.2–4.4.3.A).
- Key dimensional/locational standards
- Minimum park area: five acres (§ 4.4.4.A).
- Density: may not exceed underlying zone; up to 50% increase if at least 15% of lots are for single‑wide homes (§ 4.4.4.B).
- Perimeter landscape yards: 20 ft (public street) and 10 ft (interior property line) (§ 4.4.4.C).
- Public street frontage: 60 ft minimum (66 ft with PUPF) (§ 4.4.4.D).
- Minimum lot size: 1,100 sq ft; strict separation and interior roadway widths; water/sewer required; parking per § 5.10 (§ 4.4.4.E–N).
- One-time ministerial expansion up to 10% of lots allowed under CA Gov. Code 65852.8 (§ 4.4.5).
Natural Streams (NS) Combining Zoning District
- Purpose and where it applies
- Protects designated creeks/sloughs (e.g., Arcade Creek, Carmichael Creek, Strong Ranch Slough) and adjacent properties in unincorporated areas (§ 4.5.1, § 4.5.1.A).
- Typical permitted uses/approvals
- Generally, underlying permitted/conditional uses become conditional in the NS overlay—CUP required—except limited activities the Planning Director can approve administratively if they meet objective standards (§ 4.5.2.A–B, § 4.5.2.E).
- Key dimensional/locational standards
- Elevate lowest habitable floor 1.5 ft above 100‑year flood, or at/above 200‑year flood where Urban Level of Flood Protection applies (§ 4.5.3.B.1).
- No new fill or construction within the 100‑year floodway; landfill in floodplains is tightly limited (§ 4.5.3.C–D).
- Floodway fences/culverts must be designed to prevent obstruction and protect riparian vegetation (§ 4.5.3.C.3).
Parkway Corridor (PC) Combining Zoning District
- Purpose and where it applies
- Regulates development near the American River to preserve scenic, ecological, and bluff stability values (§ 4.7.1, § 4.7.1.A).
- PC includes erosion zones with 100‑year horizon setbacks; County‑owned property use requires Board approval (§ 4.7.1.A.3–4).
- Typical permitted uses/approvals
- Most uses from the base zone need a CUP in PC (§ 4.7.4.A).
- One single‑family, one two‑family dwelling, and customary accessory structures may proceed without CUP if located outside the total setback or outside an erosion zone, subject to Planning Director review (§ 4.7.4.B).
- Key dimensional/locational standards
- Development setbacks from bluff/terrace edges by erosion zone: Zone 1 = 40 ft total; Zone 2 = 70 ft; Zone 3 = 60 ft; Zone 4 = 60 ft; Zone 5 = entire area potentially erodible (§ Table 4.1).
- Accessory structures height max 12 ft; screening with locally native vegetation; earthtone finishes; minimum offsets from bluff edges for accessories/fences/trenching (§ 4.7.3, table/standards referenced).
- Hearing body may impose added setbacks, screening, design, colors, utilities, and revegetation conditions to reduce visual and physical impacts (§ 4.7.4.E).
Surface Mining (SM) Combining Zoning District
- Purpose and where it applies
- Protects mineral resources and requires reclamation of mined lands; may combine with AG districts, certain interim zones, industrial and office districts, and (F) (§ 4.8.1, § 4.8.1.A).
- Typical permitted uses/approvals
- “Permit” means a CUP by the Board of Supervisors for mining operations; related conveyors can extend offsite if included in the mining CUP and reclamation plan (§ 4.8.2.H; § 3.8.1.D).
- Key dimensional/locational standards
- Standards include fencing, reclamation slopes no steeper than 1:1 unless conditioned, and term provisions (≥10-year CUP term with potential renewals) (§ 4.8.16.B–D).
Delta Waterways (DW) Special Zoning District
- Purpose and where it applies
- Regulates property along the Sacramento River and Delta waterways—applies to waterways and waterside levee berm to the top of levee or MLLW where mapped DW (§ 4.9.1, § 4.9.1.A).
- Subareas: Natural (DW‑N), Scenic (DW‑S), Restricted (DW‑R) (§ 4.9.2.A–C).
- Typical permitted uses/approvals
- By right: existing lawful nonconforming buildings may remain; agriculture and minor accessory facilities; floating residences in approved marinas; hazard abatement; debris and noxious weed removal (§ 4.9.2.F).
- Prohibitions include permanent houseboat moorage outside marinas, certain industrial/non‑water‑oriented commercial uses in Scenic Areas, multi‑space private docks, and storage of hazardous materials in flood‑prone areas (§ 4.9.2.E).
- Appeal findings for approvals must address public need, alternatives, and environmental mitigation (§ 4.9.4.D).
- Related guidance
- Existing legal uses that become nonconforming follow County nonconforming uses rules alongside DW standards (§ 4.9.2.F.1).
Neighborhood Preservation Area (NPA) Combining Zoning District
- Purpose and where it applies
- Preserves unique neighborhood characteristics via supplemental development standards; established by an ordinance describing the area and standards (§ 4.6.1–4.6.2).
- Typical permitted uses/approvals
- Uses and density cannot be broadened or intensified beyond the underlying zone—NPAs adjust yards, heights, frontage, signs, etc., but do not add uses or increase density (§ 4.6.2.B).
- Key dimensional/locational standards
- Parcel-specific: each adopted NPA ordinance sets the standards; strict interpretation applies so only stated modifications supersede the base zone (§ 4.6.2–4.6.3).
Special Planning Area (SPA) Zoning District
- Purpose and where it applies
- Used for areas with unique environmental, historic, architectural, or other features where standard zoning is insufficient (§ 4.10.1).
- Typical permitted uses/approvals
- Only the Board or Planning Commission can initiate SPA zoning; each SPA ordinance must include legal description, reasons, permitted uses, performance/development standards (yards, intensity, parking, landscaping and screening, signs), and may include review procedures and nonconformity rules (§ 4.10.2.A–F).
- Key dimensional/locational standards
- Parcel-specific: strict interpretation—if the SPA doesn’t change a standard expressly, the base SZC standard applies (§ 4.10.3).
- Adopted SPAs are compiled in Title V; consult project‑area SPA for exact rules (§ 2.2.1).
Quick-Compare Standards and Approvals
| Overlay | Where It Applies (unincorporated areas) | Typical Approval Path | Key Dimensional/Use Highlights | Code Reference |
|---|---|---|---|---|
| F | 100‑yr/200‑yr flood areas; designated tributaries | Underlying approvals + overlay compliance | 1-acre min lot if no public water/sewer; tributary setback 25 ft from centerline or outside 100‑yr FP; finish floor +1.5 ft above 100‑yr (or at/above 200‑yr) | § 4.2.1.A; § 4.2.4.A–B; § 4.2.5.A.1–2 |
| FP | AG/UR zones needing land‑application wastewater | CUP by Board for plant and wastewater | Setbacks, screening; CUP review of truck routes, water use; bond and findings | § 4.3.1.A; § 4.3.2–4.3.4 |
| MHP | Combined with any residential zone | Site Development Plan; uses per Table 3.1 | 5‑acre min park; density ≤ base (up to +50% if ≥15% single‑wide lots); yards/frontage; roads/parking/water/sewer | § 4.4.4.A–N; § 4.4.5 |
| NS | Mapped along named creeks/sloughs | Most uses become CUPs; some PD-admin approvals | Elevate floors +1.5 ft; no new structures or fill in floodway; limited landfill in floodplains | § 4.5.1–4.5.3 |
| PC | Near the American River | CUP for most uses; PD-admin for limited dwellings/accessories | Erosion-zone total setbacks: 40–70–60–60 ft; 12‑ft max for accessory bldgs; native screening/earthtones | § 4.7.1–4.7.4; Table 4.1 |
| SM | Mineral resource areas (AG/industrial/interim) | CUP by Board; reclamation required | Fencing; reclaimed slopes ≤1:1; conveyor extensions by CUP | § 4.8.1–4.8.2; § 4.8.16; § 3.8.1.D |
| DW | Delta waterways/levee waterside berm | By-right/prohibited lists; other proposals require findings | Bans houseboat moorage outside marinas; limits docks; protects scenic/natural areas | § 4.9.1–4.9.2; § 4.9.4.D |
| NPA | Adopted neighborhood areas | Overlay modifies standards only | Cannot add uses/increase density; ordinance sets yards, heights, signs | § 4.6.1–4.6.3 |
| SPA | Adopted special planning areas | SPA ordinance governs | SPA sets permitted uses and standards; strict interpretation | § 4.10.1–4.10.3; Title V |
Notes:
- Many overlay projects also require design review, especially near sensitive resources; the approving authority can tailor conditions (§ 4.7.4.E).
- Signs follow county signage rules unless the overlay or permit imposes stricter conditions (§ 4.3.3.C).
- For deviations, see variances and exceptions. Special Development Permits provide flexibility in limited circumstances (§ 6.4.6).
- Historic resource overlays are typically addressed through SPAs or separate ordinances; see County historic preservation.
Practical guidance by overlay
- In F/NS/PC areas, start with a constraints map (floodplain, bluff edge, tributary centerline) and design to meet mandatory setbacks and elevation first; these drive site layout (§ 4.2.5.A; § 4.5.3; § Table 4.1).
- In DW, check whether your reach is DW‑N, DW‑S, or DW‑R; prohibited uses vary and can be outcome‑determinative (§ 4.9.2.A–E).
- In FP projects, plan early for truck routing, parking, water sourcing, and screening—these are frequent CUP conditions (§ 4.3.3–4.3.4).
- In MHP, design the perimeter yards, internal streets, and lot separations first; these are bright‑line checks at intake, along with water/sewer availability (§ 4.4.4).
Checklist
- Confirm whether your parcel lies in an overlay on the Comprehensive Zoning Plan; identify the exact overlay designation(s) and subarea(s) (e.g., DW‑N, erosion Zone 2 in PC) (§ 2.2.1; § 4.7.2.A; § 4.9.2).
- Determine your base zoning allowances and then apply the overlay’s stricter requirements (§ 4.1.3).
- Map physical constraints (floodplain limits, bluff/terrace edges, tributary centerline) and demonstrate compliance with mandatory setbacks/elevations (§ 4.2.5.A; § 4.5.3; § Table 4.1).
- Identify approval path: by-right, Planning Director administrative, CUP (Zoning Administrator/Planning Commission/Board), or project-specific SPA/NPA ordinance (§ 4.5.2.B–E; § 4.7.4.A–B; § 4.10.2.E).
- Prepare studies as required (e.g., geotechnical in PC; hydrology in F/NS; traffic/water/soil engineering for FP CUPs) (§ 4.7.4; § 4.2.5.A; § 4.3.4.A).
- Cross-check Countywide development standards (heights, yards, landscaping and screening, signage)—overlays often add to, not replace, these.
- If existing uses/structures become nonconforming under an overlay, confirm rules under County nonconforming uses and any overlay-specific allowances (e.g., DW § 4.9.2.F).
- Do not rely on building-code provisions here—structural, fire, and energy rules are under the California Building Standards Code, outside SZC scope.
Risks & Ambiguities
| Issue | Why it matters | What to verify |
|---|---|---|
| Bluff/terrace edge location (PC) | Setbacks depend on the edge location and erosion zone | How County defines bluff edge/toe for your site; whether you’re inside the “total setback” distance (§ 4.7.2.B; Table 4.1). |
| Tributary floodplain mapping (F) | Design triggers differ if within 200 ft of a designated tributary centerline | Current floodplain limits and ULOP status; finished-floor elevation proofs and any fill proposals (§ 4.2.5.A). |
| NS director-level approvals | Some minor activities can be approved without a CUP | Whether your activity fits § 4.5.2.B and meets § 4.5.3 standards; if borderline, expect a CUP (§ 4.5.2.A–B, E). |
| DW subarea boundaries | Prohibitions vary by DW‑N vs. DW‑S vs. DW‑R | The mapped subarea for your frontage and whether a proposed dock/marina is allowed (§ 4.9.2.A–E). |
| SPA/NPA local standards | Parcel-specific rules may supersede base standards | The adopted SPA/NPA ordinance text for your site (Title V); strict interpretation applies (§ 4.6; § 4.10.2–4.10.3). |
| FP CUP scope (trucks, water) | FP approvals often hinge on logistics and resource use | Parking/truck routing, well depths/yields, irrigation plans; bond or conditions likely (§ 4.3.3–4.3.4). |
Plain-English Summary
If your unincorporated Sacramento County property has an overlay, assume extra rules apply. Flood-, stream-, and parkway-related overlays control where you can build, how far you must stay from creeks/bluffs, and how high you must set your first floor. Delta Waterways limit docks and houseboat mooring. Special districts (SPA/NPA) set custom, parcel‑specific standards. Most projects still follow your base zoning, but the overlay adds stricter limits and may change your approval path (§ 4.1.3).
Information Gaps
- Natural Streams § 4.5.2.B: full list of activities permitted without a CUP was partially retrieved. Not found in retrieved materials; verify with the jurisdiction.
- Delta Waterways: detailed allowed/conditional uses beyond the by‑right and prohibited lists were not fully retrieved. Not found in retrieved materials.
Source References
- Sacramento County Zoning Code (Special and Combining Zoning Districts): § 4.1.3 (relationship to base districts); § 4.2 (F); § 4.3 (FP); § 4.4 (MHP); § 4.5 (NS); § 4.7 (PC); § 4.8 (SM); § 4.9 (DW); § 4.10 (SPA).
- Additional SZC cross-references: § 2.1.4.B (F designation basis); § 2.2.1 (CZP and Title V references); § 3.8.1 (extractive uses); § 5.10 (signs/parking); § 6.4.6 (Special Development Permits).
- GoCodebook internal guides: Sacramento County zoning & planning overview, Sacramento County Zoning, Sacramento County Land Use, Sacramento County Development Standards, Sacramento County Parking, Sacramento County Design Review, Sacramento County Historic Preservation, Sacramento County Signage, Sacramento County Nonconforming Uses, Sacramento County Variances and Exceptions, Sacramento County Landscaping and Screening, California Building Standards Code, California housing laws, California ADU law
Sources
Retrieved passages
- Sacramento County Zoning Code (Title IV) High relevance
- Sacramento County Zoning Code (Chapter to) Medium relevance
- Sacramento County Zoning Code Medium relevance
- Sacramento County Zoning Code (Section 3.10.3.H.8.a) Medium relevance
- Sacramento County Zoning Code (Chapter 4) Medium relevance
- Sacramento County Zoning Code (Section of) Medium relevance
- Sacramento County Zoning Code (Chapter 3) Medium relevance
- Sacramento County Zoning Code (Section are) Medium relevance
- Sacramento County Zoning Code (Section 4.7.4.E.2) High relevance
- Sacramento County Zoning Code (Chapter 9) High relevance
- Sacramento County Zoning Code (Chapter 9) Medium relevance
- Sacramento County Zoning Code (Section shall) Medium relevance
- Sacramento County Zoning Code (Section in) Medium relevance
- Sacramento County Zoning Code (Title 19) High relevance
- Sacramento County Zoning Code (Section 7.3) High relevance
- Sacramento County Zoning Code High relevance
- Sacramento County Zoning Code (Section 5.10) Medium relevance
- Sacramento County Zoning Code (Section in) Medium relevance
- Sacramento County Zoning Code Medium relevance
- Sacramento County Zoning Code (§21155) Medium relevance
- Sacramento County Zoning Code (Section 7.3) Medium relevance
- Sacramento County Zoning Code (CHAPTER 8) Medium relevance
- Sacramento County Zoning Code (Section 5.10) Medium relevance
- Sacramento County Zoning Code (Section 4.4.4.C.) Medium relevance
- Sacramento County Zoning Code (Section 6.4.3) Medium relevance
Cited sections
- Sacramento County Zoning Code (Special and Combining Zoning Districts): § 4.1.3 (relationship to base districts); § 4.2 (F); § 4.3 (FP); § 4.4 (MHP); § 4.5 (NS); § 4.7 (PC); § 4.8 (SM); § 4.9 (DW); § 4.10 (SPA). (§ 4.1.3)
- Additional SZC cross-references: § 2.1.4.B (F designation basis); § 2.2.1 (CZP and Title V references); § 3.8.1 (extractive uses); § 5.10 (signs/parking); § 6.4.6 (Special Development Permits). (§ 2.1.4.B)
- GoCodebook internal guides: Sacramento County zoning & planning overview, Sacramento County Zoning, Sacramento County Land Use, Sacramento County Development Standards, Sacramento County Parking, Sacramento County Design Review, Sacramento County Historic Preservation, Sacramento County Signage, Sacramento County Nonconforming Uses, Sacramento County Variances and Exceptions, Sacramento County Landscaping and Screening, California Building Standards Code, California housing laws, California ADU law
- SacramentoCounty_ZoningCode.md
Frequently asked questions
How do overlay districts interact with my base zoning in unincorporated Sacramento County?
Overlays either add to or modify your base-zone rules, and in special districts can replace them. The Code explicitly states that combining overlays add or modify standards while base-zone rules still apply unless overridden; follow the stricter standard (§ 4.1.3).
I’m near the American River. What setbacks apply from the bluff in the PC overlay?
Total setbacks from the bluff/terrace edge depend on the erosion zone: Zone 1 = 40 ft, Zone 2 = 70 ft, Zones 3–4 = 60 ft; Zone 5 is entirely constrained. Accessory structures also have specific 20‑ft/10‑ft offsets from bluff edges depending on zone (§ 4.7.3; Table 4.1).
Do I need a CUP to build a home in the Natural Streams overlay?
Most underlying permitted/conditional uses become conditional in NS. Some minor activities can be approved administratively if they meet objective standards, but new homes typically require a CUP unless expressly handled by the Planning Director under § 4.5.2.B/E (§ 4.5.2.A–B, E).
What are the elevation rules for flood-prone sites or near natural streams?
Finished floors must be at least 1.5 ft above the 100‑year flood level (or at/above the 200‑year floodplain in Urban Level of Flood Protection areas) for designated tributaries and in NS areas (§ 4.2.5.A.2; § 4.5.3.B.1).
Can I add a private dock or houseboat moorage in the Delta Waterways district?
Permanent houseboat moorage outside approved marinas is prohibited, and private multiple docks (over three boats) are largely prohibited except near commercial zoning; Natural Areas ban marinas and similar projects (§ 4.9.2.E). Existing legal nonconforming facilities may remain (§ 4.9.2.F.1).
What size and density rules apply to Mobile Home Parks?
Minimum park size is five acres; density may not exceed the underlying zone, but up to a 50% increase can be approved if at least 15% of lots are for single‑wide homes. There are also perimeter yards, frontage, lot-size, separation, roadway, parking, and utility rules (§ 4.4.4.A–N).
What does an SPA do to my site’s standards?
Each SPA ordinance sets its own permitted uses and development standards tailored to the area. If the SPA doesn’t modify a standard, the base zoning rules still apply; SPAs are strictly interpreted (§ 4.10.2.E; § 4.10.3).
Who decides if a project in the PC overlay can go forward without a CUP?
One single‑family or two‑family dwelling and customary accessories can be approved without a CUP if they are outside the total setback or erosion zone, subject to Planning Director review. Most other uses require a CUP (§ 4.7.4.A–B).
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